1 /* -*- c-file-style: "linux" -*-
3 Copyright (C) 1996-2001 by Andrew Tridgell <tridge@samba.org>
4 Copyright (C) Paul Mackerras 1996
5 Copyright (C) 2001, 2002 by Martin Pool <mbp@samba.org>
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
26 extern struct stats stats;
30 extern int am_generator;
33 extern int blocking_io;
34 extern int cvs_exclude;
35 extern int delete_mode;
36 extern int delete_excluded;
37 extern int delete_after;
38 extern int daemon_over_rsh;
42 extern int local_server;
43 extern int log_got_error;
45 extern int orig_umask;
46 extern int keep_dirlinks;
47 extern int preserve_hard_links;
48 extern int protocol_version;
50 extern int relative_paths;
51 extern int rsync_port;
52 extern int read_batch;
53 extern int write_batch;
54 extern int filesfrom_fd;
55 extern pid_t cleanup_child_pid;
56 extern char *files_from;
57 extern char *remote_filesfrom_file;
58 extern char *rsync_path;
59 extern char *shell_cmd;
60 extern struct file_list *batch_flist;
63 /* there's probably never more than at most 2 outstanding child processes,
64 * but set it higher just in case.
66 #define MAXCHILDPROCS 5
71 } pid_stat_table[MAXCHILDPROCS];
73 static void show_malloc_stats(void);
75 /****************************************************************************
76 wait for a process to exit, calling io_flush while waiting
77 ****************************************************************************/
78 void wait_process(pid_t pid, int *status)
83 while ((waited_pid = waitpid(pid, status, WNOHANG)) == 0) {
88 if (waited_pid == -1 && errno == ECHILD) {
89 /* status of requested child no longer available.
90 * check to see if it was processed by the sigchld_handler.
92 for (cnt = 0; cnt < MAXCHILDPROCS; cnt++) {
93 if (pid == pid_stat_table[cnt].pid) {
94 *status = pid_stat_table[cnt].status;
95 pid_stat_table[cnt].pid = 0;
101 /* TODO: If the child exited on a signal, then log an
102 * appropriate error message. Perhaps we should also accept a
103 * message describing the purpose of the child. Also indicate
104 * this to the caller so that thhey know something went
106 *status = WEXITSTATUS(*status);
109 static void report(int f)
111 time_t t = time(NULL);
113 if (do_stats && verbose > 1) {
114 /* These come out from every process */
123 log_exit(0, __FILE__, __LINE__);
124 if (f == -1 || !am_sender)
131 /* store total_written in a temporary
132 * because write_longint changes it */
133 w = stats.total_written;
134 write_longint(f,stats.total_read);
136 write_longint(f,stats.total_size);
141 /* this is the client */
145 stats.total_written = read_longint(f);
146 /* store total_read in a temporary, read_longint changes it */
148 stats.total_size = read_longint(f);
149 stats.total_read = r;
153 rprintf(FINFO,"\nNumber of files: %d\n", stats.num_files);
154 rprintf(FINFO,"Number of files transferred: %d\n",
155 stats.num_transferred_files);
156 rprintf(FINFO,"Total file size: %.0f bytes\n",
157 (double)stats.total_size);
158 rprintf(FINFO,"Total transferred file size: %.0f bytes\n",
159 (double)stats.total_transferred_size);
160 rprintf(FINFO,"Literal data: %.0f bytes\n",
161 (double)stats.literal_data);
162 rprintf(FINFO,"Matched data: %.0f bytes\n",
163 (double)stats.matched_data);
164 rprintf(FINFO,"File list size: %d\n", stats.flist_size);
165 rprintf(FINFO,"Total bytes written: %.0f\n",
166 (double)stats.total_written);
167 rprintf(FINFO,"Total bytes read: %.0f\n",
168 (double)stats.total_read);
171 if (verbose || do_stats) {
172 rprintf(FINFO,"\nwrote %.0f bytes read %.0f bytes %.2f bytes/sec\n",
173 (double)stats.total_written,
174 (double)stats.total_read,
175 (stats.total_written+stats.total_read)/(0.5 + (t-starttime)));
176 rprintf(FINFO,"total size is %.0f speedup is %.2f\n",
177 (double)stats.total_size,
178 (1.0*stats.total_size)/(stats.total_written+stats.total_read));
187 * If our C library can get malloc statistics, then show them to FINFO
189 static void show_malloc_stats(void)
196 rprintf(FINFO, "\n" RSYNC_NAME "[%d] (%s%s%s) heap statistics:\n",
198 am_server ? "server " : "",
199 am_daemon ? "daemon " : "",
201 rprintf(FINFO, " arena: %10d (bytes from sbrk)\n", mi.arena);
202 rprintf(FINFO, " ordblks: %10d (chunks not in use)\n", mi.ordblks);
203 rprintf(FINFO, " smblks: %10d\n", mi.smblks);
204 rprintf(FINFO, " hblks: %10d (chunks from mmap)\n", mi.hblks);
205 rprintf(FINFO, " hblkhd: %10d (bytes from mmap)\n", mi.hblkhd);
206 rprintf(FINFO, " allmem: %10d (bytes from sbrk + mmap)\n",
207 mi.arena + mi.hblkhd);
208 rprintf(FINFO, " usmblks: %10d\n", mi.usmblks);
209 rprintf(FINFO, " fsmblks: %10d\n", mi.fsmblks);
210 rprintf(FINFO, " uordblks: %10d (bytes used)\n", mi.uordblks);
211 rprintf(FINFO, " fordblks: %10d (bytes free)\n", mi.fordblks);
212 rprintf(FINFO, " keepcost: %10d (bytes in releasable chunk)\n", mi.keepcost);
213 #endif /* HAVE_MALLINFO */
217 /* Start the remote shell. cmd may be NULL to use the default. */
218 static pid_t do_cmd(char *cmd, char *machine, char *user, char *path,
219 int *f_in, int *f_out)
222 char *args[MAX_ARGS];
224 char *tok, *dir = NULL;
227 if (!read_batch && !local_server) {
228 char *rsh_env = getenv(RSYNC_RSH_ENV);
237 for (tok = strtok(cmd, " "); tok; tok = strtok(NULL, " ")) {
238 /* Comparison leaves rooms for server_options(). */
239 if (argc >= MAX_ARGS - 100) {
240 rprintf(FERROR, "internal: args[] overflowed in do_cmd()\n");
241 exit_cleanup(RERR_SYNTAX);
246 /* check to see if we've already been given '-l user' in
247 * the remote-shell command */
248 for (i = 0; i < argc-1; i++) {
249 if (!strcmp(args[i], "-l") && args[i+1][0] != '-')
254 /* remsh (on HPUX) takes the arguments the other way around */
255 args[argc++] = machine;
256 if (user && !(daemon_over_rsh && dash_l_set)) {
261 if (user && !(daemon_over_rsh && dash_l_set)) {
265 args[argc++] = machine;
268 args[argc++] = rsync_path;
270 if (blocking_io < 0) {
272 if ((cp = strrchr(cmd, '/')) != NULL)
276 if (strcmp(cp, "rsh") == 0 || strcmp(cp, "remsh") == 0)
280 server_options(args,&argc);
282 if (argc >= MAX_ARGS - 2) {
283 rprintf(FERROR, "internal: args[] overflowed in do_cmd()\n");
284 exit_cleanup(RERR_SYNTAX);
290 if (!daemon_over_rsh && path && *path)
296 rprintf(FINFO,"cmd=");
297 for (i = 0; i < argc; i++)
298 rprintf(FINFO,"%s ",args[i]);
304 create_flist_from_batch(); /* sets batch_flist */
305 ret = local_child(argc, args, f_in, f_out, child_main);
307 ret = piped_child(args,f_in,f_out);
316 out_of_memory("do_cmd");
317 return 0; /* not reached */
321 static char *get_local_name(struct file_list *flist,char *name)
327 rprintf(FINFO,"get_local_name count=%d %s\n",
328 flist->count, NS(name));
333 if (do_stat(name,&st) == 0) {
334 if (S_ISDIR(st.st_mode)) {
335 if (!push_dir(name)) {
336 rsyserr(FERROR, errno, "push_dir#1 %s failed",
338 exit_cleanup(RERR_FILESELECT);
342 if (flist->count > 1) {
343 rprintf(FERROR,"ERROR: destination must be a directory when copying more than 1 file\n");
344 exit_cleanup(RERR_FILESELECT);
349 if (flist->count <= 1 && ((e = strlen(name)) <= 1 || name[e-1] != '/'))
352 if (do_mkdir(name,0777 & ~orig_umask) != 0) {
353 rsyserr(FERROR, errno, "mkdir %s failed", full_fname(name));
354 exit_cleanup(RERR_FILEIO);
357 rprintf(FINFO,"created directory %s\n",name);
360 if (!push_dir(name)) {
361 rsyserr(FERROR, errno, "push_dir#2 %s failed",
363 exit_cleanup(RERR_FILESELECT);
370 static void do_server_sender(int f_in, int f_out, int argc,char *argv[])
373 struct file_list *flist;
377 rprintf(FINFO, "server_sender starting pid=%ld\n",
381 if (am_daemon && lp_write_only(module_id) && am_sender) {
382 rprintf(FERROR, "ERROR: module is write only\n");
383 exit_cleanup(RERR_SYNTAX);
387 if (!relative_paths && !push_dir(dir)) {
388 rsyserr(FERROR, errno, "push_dir#3 %s failed",
390 exit_cleanup(RERR_FILESELECT);
395 if (strcmp(dir,".")) {
397 if (strcmp(dir,"/") == 0)
399 for (i = 0; i < argc; i++)
403 if (argc == 0 && recurse) {
409 flist = send_file_list(f_out,argc,argv);
410 if (!flist || flist->count == 0) {
414 io_start_buffering_in(f_in);
415 io_start_buffering_out(f_out);
416 send_files(flist,f_out,f_in);
417 io_flush(FULL_FLUSH);
419 if (protocol_version >= 24) {
420 /* final goodbye message */
423 io_flush(FULL_FLUSH);
428 static int do_recv(int f_in,int f_out,struct file_list *flist,char *local_name)
434 if (preserve_hard_links)
435 init_hard_links(flist);
438 /* I moved this here from recv_files() to prevent a race condition */
439 if (recurse && delete_mode && !local_name && flist->count>0) {
444 if (fd_pair(error_pipe) < 0) {
445 rprintf(FERROR,"error pipe failed in do_recv\n");
446 exit_cleanup(RERR_SOCKETIO);
449 io_flush(NORMAL_FLUSH);
451 if ((pid=do_fork()) == 0) {
452 close(error_pipe[0]);
456 /* we can't let two processes write to the socket at one time */
457 io_multiplexing_close();
459 /* set place to send errors */
460 set_msg_fd_out(error_pipe[1]);
462 recv_files(f_in,flist,local_name);
463 io_flush(FULL_FLUSH);
466 send_msg(MSG_DONE, "", 0);
467 io_flush(FULL_FLUSH);
468 /* finally we go to sleep until our parent kills us
469 * with a USR2 signal. We sleep for a short time as on
470 * some OSes a signal won't interrupt a sleep! */
477 close(error_pipe[1]);
481 io_start_buffering_out(f_out);
483 set_msg_fd_in(error_pipe[0]);
485 generate_files(f_out, flist, local_name);
487 get_redo_num(); /* Read final MSG_DONE and any prior messages. */
489 io_flush(FULL_FLUSH);
490 if (protocol_version >= 24) {
491 /* send a final goodbye message */
492 write_int(f_out, -1);
494 io_flush(FULL_FLUSH);
498 wait_process(pid, &status);
503 static void do_server_recv(int f_in, int f_out, int argc,char *argv[])
506 struct file_list *flist;
507 char *local_name = NULL;
511 rprintf(FINFO, "server_recv(%d) starting pid=%ld\n",
512 argc, (long)getpid());
515 if (am_daemon && lp_read_only(module_id) && !am_sender) {
516 rprintf(FERROR,"ERROR: module is read only\n");
517 exit_cleanup(RERR_SYNTAX);
526 if (!am_daemon && !push_dir(dir)) {
527 rsyserr(FERROR, errno, "push_dir#4 %s failed",
529 exit_cleanup(RERR_FILESELECT);
533 io_start_buffering_in(f_in);
534 if (delete_mode && !delete_excluded)
535 recv_exclude_list(f_in);
537 if (filesfrom_fd >= 0) {
538 /* We're receiving the file info from the sender, so we need
539 * the IO routines to automatically write out the names onto
540 * our f_out socket as we read the list info from the sender.
541 * This avoids both deadlock and extra delays/buffers. */
542 io_set_filesfrom_fds(filesfrom_fd, f_out);
549 flist = recv_file_list(f_in);
551 rprintf(FERROR,"server_recv: recv_file_list error\n");
552 exit_cleanup(RERR_FILESELECT);
556 if (strcmp(dir,".")) {
557 argv[0] += strlen(dir);
558 if (argv[0][0] == '/')
561 local_name = get_local_name(flist,argv[0]);
564 status = do_recv(f_in,f_out,flist,local_name);
565 exit_cleanup(status);
569 int child_main(int argc, char *argv[])
571 start_server(STDIN_FILENO, STDOUT_FILENO, argc, argv);
576 void start_server(int f_in, int f_out, int argc, char *argv[])
578 setup_protocol(f_out, f_in);
580 set_nonblocking(f_in);
581 set_nonblocking(f_out);
583 if (protocol_version >= 23)
584 io_start_multiplex_out(f_out);
587 keep_dirlinks = 0; /* Must be disabled on the sender. */
589 recv_exclude_list(f_in);
593 do_server_sender(f_in, f_out, argc, argv);
595 do_server_recv(f_in, f_out, argc, argv);
602 * This is called once the connection has been negotiated. It is used
603 * for rsyncd, remote-shell, and local connections.
605 int client_run(int f_in, int f_out, pid_t pid, int argc, char *argv[])
607 struct file_list *flist = NULL;
608 int status = 0, status2 = 0;
609 char *local_name = NULL;
611 cleanup_child_pid = pid;
615 set_nonblocking(f_in);
616 set_nonblocking(f_out);
618 setup_protocol(f_out,f_in);
620 if (protocol_version >= 23)
621 io_start_multiplex_in(f_in);
624 keep_dirlinks = 0; /* Must be disabled on the sender. */
625 io_start_buffering_out(f_out);
628 if (delete_mode && !delete_excluded)
629 send_exclude_list(f_out);
630 if (remote_filesfrom_file)
632 if (!read_batch) /* don't write to pipe */
633 flist = send_file_list(f_out,argc,argv);
635 rprintf(FINFO,"file list sent\n");
637 io_flush(NORMAL_FLUSH);
638 send_files(flist,f_out,f_in);
639 io_flush(FULL_FLUSH);
640 if (protocol_version >= 24) {
641 /* final goodbye message */
646 rprintf(FINFO,"client_run waiting on %d\n", (int) pid);
647 io_flush(FULL_FLUSH);
648 wait_process(pid, &status);
651 io_flush(FULL_FLUSH);
652 exit_cleanup(status);
659 send_exclude_list(f_out);
661 if (filesfrom_fd >= 0) {
662 io_set_filesfrom_fds(filesfrom_fd, f_out);
666 flist = recv_file_list(f_in);
667 if (!flist || flist->count == 0) {
668 rprintf(FINFO, "client: nothing to do: "
669 "perhaps you need to specify some filenames or "
670 "the --recursive option?\n");
674 local_name = get_local_name(flist,argv[0]);
676 status2 = do_recv(f_in,f_out,flist,local_name);
680 rprintf(FINFO,"client_run2 waiting on %d\n", (int) pid);
681 io_flush(FULL_FLUSH);
682 wait_process(pid, &status);
685 return MAX(status, status2);
688 static int copy_argv (char *argv[])
692 for (i = 0; argv[i]; i++) {
693 if (!(argv[i] = strdup(argv[i]))) {
694 rprintf (FERROR, "out of memory at %s(%d)\n",
705 * Start a client for either type of remote connection. Work out
706 * whether the arguments request a remote shell or rsyncd connection,
707 * and call the appropriate connection function, then run_client.
709 * Calls either start_socket_client (for sockets) or do_cmd and
710 * client_run (for ssh).
712 static int start_client(int argc, char *argv[])
715 char *shell_machine = NULL;
716 char *shell_path = NULL;
717 char *shell_user = NULL;
723 /* Don't clobber argv[] so that ps(1) can still show the right
725 if ((rc = copy_argv(argv)))
728 /* rsync:// always uses rsync server over direct socket connection */
729 if (strncasecmp(URL_PREFIX, argv[0], strlen(URL_PREFIX)) == 0) {
732 host = argv[0] + strlen(URL_PREFIX);
733 p = strchr(host,'/');
740 p = strchr(host,':');
742 rsync_port = atoi(p+1);
745 return start_socket_client(host, path, argc-1, argv+1);
748 if (!read_batch) { /* for read_batch, NO source is specified */
749 p = find_colon(argv[0]);
750 if (p) { /* source is remote */
751 if (remote_filesfrom_file
752 && remote_filesfrom_file != files_from + 1
753 && strncmp(files_from, argv[0], p-argv[0]+1) != 0) {
755 "--files-from hostname is not transfer hostname\n");
756 exit_cleanup(RERR_SYNTAX);
758 if (p[1] == ':') { /* double colon */
761 return start_socket_client(argv[0], p+2,
768 if (argc < 1) { /* destination required */
770 exit_cleanup(RERR_SYNTAX);
775 shell_machine = argv[0];
778 } else { /* source is local */
781 /* rsync:// destination uses rsync server over direct socket */
782 if (strncasecmp(URL_PREFIX, argv[argc-1], strlen(URL_PREFIX)) == 0) {
785 host = argv[argc-1] + strlen(URL_PREFIX);
786 p = strchr(host,'/');
793 p = strchr(host,':');
795 rsync_port = atoi(p+1);
798 return start_socket_client(host, path, argc-1, argv);
801 p = find_colon(argv[argc-1]); /* look in dest arg */
802 if (p && remote_filesfrom_file
803 && remote_filesfrom_file != files_from + 1
804 && strncmp(files_from, argv[argc-1], p-argv[argc-1]+1) != 0) {
806 "--files-from hostname is not transfer hostname\n");
807 exit_cleanup(RERR_SYNTAX);
809 if (!p) { /* no colon found, so src & dest are local */
811 if (remote_filesfrom_file) {
813 "--files-from is remote but transfer is local\n");
814 exit_cleanup(RERR_SYNTAX);
816 } else if (p[1] == ':') { /* double colon */
819 return start_socket_client(argv[argc-1], p+2,
828 exit_cleanup(RERR_SYNTAX);
832 shell_machine = NULL;
833 shell_path = argv[argc-1];
836 shell_machine = argv[argc-1];
841 } else { /* read_batch */
844 shell_path = argv[argc-1];
848 p = strrchr(shell_machine,'@');
851 shell_user = shell_machine;
857 rprintf(FINFO,"cmd=%s machine=%s user=%s path=%s\n",
858 shell_cmd?shell_cmd:"",
859 shell_machine?shell_machine:"",
860 shell_user?shell_user:"",
861 shell_path?shell_path:"");
864 /* for remote source, only single dest arg can remain ... */
865 if (!am_sender && argc > 1) {
867 exit_cleanup(RERR_SYNTAX);
870 /* ... or no dest at all */
871 if (!am_sender && argc == 0) {
875 pid = do_cmd(shell_cmd,shell_machine,shell_user,shell_path,
878 /* if we're running an rsync server on the remote host over a
879 * remote shell command, we need to do the RSYNCD protocol first */
880 if (daemon_over_rsh) {
882 tmpret = start_inband_exchange(shell_user, shell_path,
888 ret = client_run(f_in, f_out, pid, argc, argv);
897 static RETSIGTYPE sigusr1_handler(UNUSED(int val))
899 exit_cleanup(RERR_SIGNAL);
902 static RETSIGTYPE sigusr2_handler(UNUSED(int val))
904 if (log_got_error) _exit(RERR_PARTIAL);
908 static RETSIGTYPE sigchld_handler(UNUSED(int val))
913 /* An empty waitpid() loop was put here by Tridge and we could never
914 * get him to explain why he put it in, so rather than taking it
915 * out we're instead saving the child exit statuses for later use.
916 * The waitpid() loop presumably eliminates all possibility of leaving
917 * zombie children, maybe that's why he did it.
919 while ((pid = waitpid(-1, &status, WNOHANG)) > 0) {
920 /* save the child's exit status */
921 for (cnt = 0; cnt < MAXCHILDPROCS; cnt++) {
922 if (pid_stat_table[cnt].pid == 0) {
923 pid_stat_table[cnt].pid = pid;
924 pid_stat_table[cnt].status = status;
934 * This routine catches signals and tries to send them to gdb.
936 * Because it's called from inside a signal handler it ought not to
937 * use too many library routines.
939 * @todo Perhaps use "screen -X" instead/as well, to help people
940 * debugging without easy access to X. Perhaps use an environment
941 * variable, or just call a script?
943 * @todo The /proc/ magic probably only works on Linux (and
944 * Solaris?) Can we be more portable?
946 #ifdef MAINTAINER_MODE
947 const char *get_panic_action(void)
949 const char *cmd_fmt = getenv("RSYNC_PANIC_ACTION");
954 return "xterm -display :0 -T Panic -n Panic "
955 "-e gdb /proc/%d/exe %d";
960 * Handle a fatal signal by launching a debugger, controlled by $RSYNC_PANIC_ACTION.
962 * This signal handler is only installed if we were configured with
963 * --enable-maintainer-mode. Perhaps it should always be on and we
964 * should just look at the environment variable, but I'm a bit leery
965 * of a signal sending us into a busy loop.
967 static RETSIGTYPE rsync_panic_handler(UNUSED(int whatsig))
972 sprintf(cmd_buf, get_panic_action(),
975 /* Unless we failed to execute gdb, we allow the process to
976 * continue. I'm not sure if that's right. */
977 ret = system(cmd_buf);
984 int main(int argc,char *argv[])
993 signal(SIGUSR1, sigusr1_handler);
994 signal(SIGUSR2, sigusr2_handler);
995 signal(SIGCHLD, sigchld_handler);
996 #ifdef MAINTAINER_MODE
997 signal(SIGSEGV, rsync_panic_handler);
998 signal(SIGFPE, rsync_panic_handler);
999 signal(SIGABRT, rsync_panic_handler);
1000 signal(SIGBUS, rsync_panic_handler);
1001 #endif /* def MAINTAINER_MODE */
1003 starttime = time(NULL);
1004 am_root = (MY_UID() == 0);
1006 memset(&stats, 0, sizeof(stats));
1010 exit_cleanup(RERR_SYNTAX);
1013 /* we set a 0 umask so that correct file permissions can be
1015 orig_umask = (int)umask(0);
1017 if (!parse_arguments(&argc, (const char ***) &argv, 1)) {
1018 /* FIXME: We ought to call the same error-handling
1019 * code here, rather than relying on getopt. */
1021 exit_cleanup(RERR_SYNTAX);
1024 signal(SIGINT,SIGNAL_CAST sig_int);
1025 signal(SIGHUP,SIGNAL_CAST sig_int);
1026 signal(SIGTERM,SIGNAL_CAST sig_int);
1028 /* Ignore SIGPIPE; we consistently check error codes and will
1030 signal(SIGPIPE, SIG_IGN);
1032 /* Initialize push_dir here because on some old systems getcwd
1033 * (implemented by forking "pwd" and reading its output) doesn't
1034 * work when there are other child processes. Also, on all systems
1035 * that implement getcwd that way "pwd" can't be found after chroot. */
1040 if (write_batch && !am_server) {
1041 write_batch_argvs_file(orig_argc, orig_argv);
1044 if (am_daemon && !am_server)
1045 return daemon_main();
1049 exit_cleanup(RERR_SYNTAX);
1053 verbose = MAX(verbose,1);
1056 set_nonblocking(STDIN_FILENO);
1057 set_nonblocking(STDOUT_FILENO);
1059 return start_daemon(STDIN_FILENO, STDOUT_FILENO);
1060 start_server(STDIN_FILENO, STDOUT_FILENO, argc, argv);
1063 ret = start_client(argc, argv);
1065 exit_cleanup(RERR_STARTCLIENT);